...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::proto::wants_basic_expr
// In header: <boost/proto/generate.hpp>
template<typename Generator>
struct wants_basic_expr : mpl::bool_< true-or-false
> {
};
A Boolean metafunction that tests a generator to see whether
it would prefer to be passed instances of
proto::basic_expr<>
rather than
proto::expr<>
.